In my experience, HN users tend to have incredibly specialized interests. I'm curious about what newsletters are out there that deliver a depth of specialized knowledge?
For me, it doesn't get better than 'The Prepared' and the 'Future of Trucks' newsletters. Both provide a window into technicalities that I wouldn't otherwise think about in fields that I'm broadly interested in.
https://theprepared.org/
https://www.trucks.vc/newsletter
https://restofworld.org/newsletters/world/
While it definitely promotes our stories, I like the the "What we're reading" and "one more thing" which are usually interesting and external content. I think all this contributes to our fairly high open-rates and healthy organic subscription growth.
There are two other content driven newsletters for South Asia and Latin America but that global newsletter is my favorite.
https://restofworld.org/newsletters/